Hydraulic brake mechanism.



B. NAGELVOORT.

HYDRAULIC BRAKE MECHANISM. I

APPLICATION FILED MAY 31 1912 1,149,. Patented Aug. 10, 1915'.

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INVENTOR figycizwrf Allurney B. NAGELVOORT.

HYDRAUIJC BRAKE MECHANISM.

APPLICATION FILED MAY3I. 191 2.

41 M 93, Patented Aug. 10, 1915.

2 SHEETS-SHEET 2.

Allamey ED STAS BA E F C BEBNABD NAGELVOORT, F DETROIT, MICHIGAN, ASSIGNOR TO. PACKARD MOTOR. CAB

- COMPANY, OF DETROIT, MICHIGAN, ACORIPORATION OF MICHIGAN.

HYDRAULIC BRAKE MECHANISM.

Specification of Letters Patent.

Batented M re, 1915.

Application filed May 31, 1912. Serial No. 700,902.

To all whom it may concern Be it known that I, BERNARD Naonnvoonr, a citizen of the United States, and resident of Detroit,Wa'yne-\coun ty, State of Michigan, have invented certain new and useful Improvements in Hydraulic Brake Mechanism, of which the following is a specification.

This'invention relates to hydraulic brake mechanism and particularly to a brake of 1 that character designed for absorbing horse power in testing motors of various kinds.

One of the objects of the invention is to construct a mechanism of the above type which shall be eflicient in operation. and

7 simple inconstruction and therefore inexpensive to build.

Other objects of the invention will appear from the ,following description taken in connection with the drawings, in which,

Figure 1 is a perspective view of a machine built in accordance with this inven-' tion; Fig. 2 is a part longitudinal sectionand part elevation of the machine shown in Fig. 1; Fig. 3 is a part section on the line 33 of Fig. 2, the lower part of the view being in elevation; and Fig. 4: is an enlarged sectional view.

In the drawings the machine is illustrated as being supported on separated standards 10, in which the shaft 11 is mounted in suitable bearings. .A rotor 12 is keyed to the shaft 11 and a drum or casin 13 surrounds the rotor and the shaft, being supported on the latter. This drum 13 is composed of acylindrical body portion 14 and end plates 15 which plates are provided with packing glands 16 thereby making a water tight compartment in which the rotor operates. A liquid such as water, is supplied to the interior of the drum by an inlet pipe 17 controlled by hand valve 18, and by means-of an outlet pipe 19' at the top of the drum the latter has a constant flow of water through it. As shown, the inlet pipe 17 supplies the liquid to the drum at a point radially inward of said cavities, from where it flows radially outward past the sidesof the rotor and is exhausted through the plpe 19.

The drum has arms 20 suitably connected with its flanges 21 and extending laterally as shown particularly in Figs. 1 and 3, and a link 22 connects the outer end or these arms 20 with a scale or other suit ble dew for measuring the pull on see 2" e scale not being shown in the drawin s. This.

strap 22 and 1ts connections tend 0 course, to retain the drum against rotating with the rotor 12.

The contiguous walls of the casing member 13 and the rotor 12 are provided with surfaces which are adapted to coiiperate with a liquid between them, these'surfaces being arranged radially of each other, as

filled with water or other fluid, the rotation of the rotor 12 in the direction indicatedby the arrow in Fi {i will be resisted by reason of the fact t at the water will be forced into the cavities and torn apart or.

disintegrated by theedges of the cavities in the rotor acting agamst the opposing edges of the cavities in the drum.

The amount of resistance ofi'ered by the water is determined by the degree to which the cavities in the rotor and .in the drum are permitted to oppose each other, and this is determined. in the present instance by inserting a ring or rings between the periphery of the rotor 12 and the drum'so asto out out as it were one or both sides of the periphery of the rotor.

In the drawings two rings 25 are shown and there is an annular space 26 formed in the drum ends 15 in which these rings normally lie. The rings are insertedinto and withdrawn from the space between the cavi-. ties of the rotor and of the drum by means of a pair of rods 27 each of which has right and left hand threads thereon which cotiperate with threaded blocks 28 on the rings.

These rods27 are operated in unison by a hand wheel 29 and chain and sprocket connection 30, the hand wheel being arranged on the outside of the drum for convenient manual operation. 7 a

It will be understood that the rings 25 are moved into the space between the periphery of the rotor and the body ortion 14 of the drum for the purpose of ecreasing the resistance to the operation 02 the 3. In amachine of the class described, the combination with a drum and a rotor there- 7 in, said rotor having peripheral tangentially rotor 12, and the reverse operation takm place when it is desired to increase this resistance. r a

It will be further understood that the 2m ve'ntion is not limited to the struction shown. but ma to be covered by the'claims.

What I claim is: Y 1. In a hydraulic brake mechanism, the

combination with an outer casing member and an inner. relatively rotatable member, said members having separated surfaces adapted to coiiperate with a liquid between them and said surfaces being arranged .ra-

dially of each other, of means for supplying a liquid between said surfaces, means mov able independently of said surfaces for .var 'ng the degree of coiiperation between sai surfaces, and means for rotating one of said members.

% In a hydraulic brake mechanism, the

a combination with a drum and a rotor theresimilar cavities in itssurface opposite an in, said rotor having peripheral tangentially arranged cavities and said drum havin f radially of the periphery of said rotor,

means adapted to be inserted between-said -cavities to render them more or less efiecsupplying liquid to said tive, and means for arranged cavities I and said drum-having similar cavities in its surface opposite, the

' combination with spaced supports, a shaft, rotatably mounted in' saidsupports, a rotor 4s keyed a said Shaft, a drum mounted on said cavities, means for h 6 rotation, and means for supplying li uid to. 4 6 ties more or less eiiective' comprising a ring adapted to be inserted and withdrawn from periphery of said rotor, a ring adapted to be" inserted -a'rui withdrawn from between said cavities to renderthem more or less effective, and means for supplying liquid to '4. In a machine of the class described, the

shaft and surrounding.said.rotor, said rotor and said drum havinglg'pposed peripheral 01 g the drum against cavisaid drum, of means for rail ermg sai between; the rotor and the drum.

5. In a machinejofthe class described combination with spaced supports, a

the

e'cific conin nde many modifications thereof whic will be deemed sheaf, rotatably mounted in said supports, a rotor keyed to -said shaft, a mounted. on

'niaaese said shaft and surrounding said rotor, said i rotor and said drum having 0 posed periph: eral cavities, means for hol gthe drum against rotation, and means for supplying liquid to said drum, of a ring adapted "to enter the space between the cavities to render them more or less inoperative, and means extending through the end of the drum for 1 taneously drawing said rings into said space and withdrawing them therefrom.

7. a In a machine of the class described, the combination with a drum and a rotor therein, said rotor having peripheral cavitiestherein and said drum having opposing cavities in its adjacent surface, of a pair of rings adapted to enter the space between the cavities to render them more or'less inoperative, and right and left hand threaded rods enga g each of said rings at two points for simultaneously and uniformly drawing said rings into said space and-withdrawing themtherefrom.

8. In a hydraulic "brake mechanism, the combination with a stationary drum, of a so rotor mounted therein, said drum and rotor I being formed with relatively radial coiiperating cavities, means for an plying a liquid to said drum at a point ra ally inward of said cavities, means for exhausting the liquid from said drum, and means for operating said rotor.

- 9. Ina hydraulic brake lilchanisln, the combination witha' stationary drum, of a rotor mounted therein,said drum and rotor ating cavities, and with. a space between the sides of the rotor, and the casing for the Bass e of liquid, means for sup lying a 'qui? to said drum at a point ra 'ally m- In testimony whereo my signature in the presenceoftwowitncms.

BERNARD NAGELVOOET. -Wimcsses:' 1

Gmo. E, German. a

ward of said cavities, means for exhausting, the liquidiromthe' periphery of the drum,

and means for bperatin said rotor.-

being formed with relatively radial coiiper- 

